Property data.
Rent data.
One API.
The real estate data layer developers actually want. Rent trends, sale-to-list ratios, vacancy rates, bedroom-level HUD rents, live mortgage rates, and AI investor signals — merged from 10 sources into one clean JSON response. No per-call fees. No enterprise contracts. Ship in an afternoon.
Ten sources.
One response.
Zero compromise.
PropData aggregates 10 sources — Zillow ZORI, Realtor.com, Redfin, HUD Fair Market Rents, Census ACS, FHFA HPI, FRED macro data, a proprietary Estimate Engine, and County Assessor Records — 7M+ King County WA parcels live, growing to 20+ counties. Owner names, assessed values, last sale prices, skip trace. Flat $49/mo. Zero per-call fees.
Fair Market Rents
The government's official rent benchmark — the same data used to set Section 8 voucher amounts. Every county in America. Studio through 4-bedroom. Ground truth for affordability analysis.
Observed Rent Index
ZORI — Zillow's smoothed median asking rent for all homes and multifamily. The most cited rent trend dataset in real estate. ZIP, metro, state, and national with 10 years of history.
Market Metrics
Monthly listing data: median prices, days on market, active inventory, new listings, price reductions, price per sqft. The pulse of the for-sale market at ZIP level.
Market Tracker
Sale-to-list ratio, % sold above list, days to pending, months of supply. The sharpest demand signal in public real estate data.
ACS Demographics
Vacancy rates, renter %, median income, rent-to-income ratio. Affordability context nobody else includes at this price.
FRED Macro Data
Mortgage rates, shelter inflation, national vacancy rate, and housing starts. National economic context alongside local market data — no other API at this price point includes this.
House Price Index
Quarterly home price appreciation by state and metro. The definitive government measure of home value change — used by mortgage lenders, Fed economists, and institutional investors.
Building Permits
Monthly new construction by unit type. The forward-looking supply signal — permits today become inventory in 12-18 months. Predicts rent pressure before it shows up in listing data.
PropData Estimate Engine
Weighted rent estimate model built on owned data. ZORI (40%) + Census ACS (25%) + HUD FMR (20%) + Redfin cap rate (15%). Returns low/mid/high range with confidence score. No third-party dependency. No scraping. Ours.
RentCast charges per call.
ATTOM charges enterprise.
PropData charges $49.
The only API with rent data, market velocity, and county assessor records — owner names, assessed values, skip trace — all at $49/mo flat. Built by Justin Erickson / PropTechUSA.ai. The data ATTOM charges $2,000/mo for. Free tier, no credit card. 165+ Cloudflare Workers in production.